American Journal of Scientific Research and Essays


Experimental Study on the Performance of on-site Mixed Emulsion Explosives and Rock Impedance Matching

Research article of American Journal of Scientific Research and Essays Experimental Study on the Performance of on-site Mixed Emulsion Explosives and Rock Impedance Matching Huang Shengsong1, Zhao Mingsheng1,2*, Zhang Yiping1, Zhao Kejie1 1Mining School, Guizhou University, Guiyang 550025, China. 2Guizhou Xinlian Blasting Engineering Limited Corp, Guiyang 550002, China The proportion of on-site mixed emulsion explosives in mining is getting higher and higher, in order to better use the explosive performance of mixed explosives to improve energy utilization. Based on the wave impedance theory, the wave impedance of mixed explosives is changed to make rocks The wave impedances are matched to achieve the purpose of improving the blasting effect and reducing the bulk rate. After field test, increasing the sensitizer content within a certain range is beneficial to the improvement of explosive performance. When the explosive sensitizer content is 1.15%, the best matching coefficient of mixed explosive and rock impedance is 2.51, the rock after blasting is large. The block rate is reduced and the rock crushing effect is better. After this matching test, it is shown that it is feasible to improve the blasting performance by adjusting the explosive performance of the explosive by the optimal wave impedance coefficient according to the hardness of the rock, which can provide reference for the peers. Keywords: Impedance matching coefficient; Explosive performance; Blasting effect ...

Numerical simulation of propeller jet field based on Star-ccm+

Research article of American Journal of Scientific Research and Essays Numerical simulation of propeller jet field based on Star-ccm+ Peng-rong Li College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China. During the ship’s voyage, the propeller jet affects the movement of silt at the bottom of the bed. To research the influence of the bottom boundary on the propeller jet field, this paper takes the standard propeller DTRC4119 propeller as the research object and uses the CFD software Star-ccm+ to carry out a numerical simulation of the propeller jet under uniform flow. The flow velocity distribution of the jet under four operating conditions is mainly analyzed, including the axial velocity, tangential velocity and radial velocity of the jet. The results show that the distance between the propeller and the boundary does not affect the magnitude and distribution of the velocity on the initial plane but affects the shape of the axial velocity and the velocity on the central axis in the development zone; The closer to the bottom boundary, the greater the disturbance of tangential velocity and radial velocity, the peak value of tangential velocity will be affected and changed from central symmetry of velocity to unanimous trend earlier. The radial velocity contributes less to the overall velocity and can be ignored. Keywords: Propeller; Jet field; CFD ...

Development of a workpiece transfer machine based on a gas-electric hybrid system

Research article of American Journal of Scientific Research and Essays Development of a workpiece transfer machine based on a gas-electric hybrid system Qiang Gu1*, Wenxing Wang2, Yu Cao3 1College of Mechanical and Power Engineering, China Three Gorges University, Yichang, 443002, China. 2College of Materials and Chemical Engineering, China Three Gorges University, Yichang, 443002, China. 3College of Science, China Three Gorges University, Yichang 443002, China. To solve the problem of transferring the workpiece to the next process, design a gas-electric hybrid workpiece transfer machine. The mechanical structure of workpiece transfer in automatic production line is discussed. The transfer of workpiece can be realized by pulse motor, pneumatic system is used to clamp and lift the workpiece,and design this system, analyze the principle of pneumatic system and design the PLC circuit. The results show that the designed device has the characteristics of simple structure, operability and practicability. Keywords: Gas-electric hybrid power system; PLC workpiece transfer device ...

Finding Waldo: Two Routes for Processing Visual Search in Complex Scenic Images

Review article of American Journal of Scientific Research and Essays Finding Waldo: Two Routes for Processing Visual Search in Complex Scenic Images Andrew Hwang Newark Academy This paper reviews the cognitive mechanisms underlying visual search in complex visual images. Visual search is a type of task that we are constantly engaged in our everyday lives. Here, the current paper introduces the current literature that suggests that there are two different processing routes that support visual search in human observers: Bottom-up and Top-down processing. Bottom-up processing allows the visual system to process the sensory information from the visual image as it is, whereas top-down processing guides the visual system to efficiently allocate attention to a part of the image to facilitate the search process. The two processing routes via bottom-up and top-down processing work in concert during complex visual search, guiding our search behavior to be more efficient and adaptive. In closing remark, this review also briefly discusses how the current knowledge about the roles of bottom-up and top-down processing in visual search can contribute to development of computer vision and artificial intelligent. Keywords: Two Routes, Processing Visual Search, Complex Scenic Images ...

Prof. Dr. Mohammad Mehdi Rashidi
Shanghai Key Lab of Vehicle Aerodynamics and Vehicle Thermal Management, Systems, Tongji Clean Energy Institute of advanced studies- Tongji University.

Dr. Milena Palczewska
Vice Dean for student affairs, Military Faculty, War Studies University, al. gen. Antoniego Chruściela “Montera” 10300-910 Warszawa

Dr. Piyush Chaudhary
Assistant Professor, Deptt of Ras Shastra (Ayurvedic Pharmaceutics), Incharge, Gurukul Pharmacy, MSM Institute of Ayurveda, BPS Women University, Khanpur Kalan, Sonepat, Haryana

Dr. M. M. Awad
Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt

Dr.Eng. Ahmed Kadhim Hussein
College of Engineering, Department of Mechanical Engineering, Babylon University, Babylon City, HIILA , IRAQ

Dr. KATSURA Hidemitsu 
Guest Lecturer for ICEEE-2016, Coimbatore Institute of Technology (CIT) in COIMBATORE, TAMIL NADU 641014, INDIA

Dr. Sang-Bing Tsai
Prof., School of Business, Dalian University of Technology, Panjin, 124221, China; Prof., Zhongshan Institute, University of Electronic Science and Technology of China; Prof., TEDA College, Nankai University, China

Dr. Deepmala 
Visiting Scientist, SQC & OR Unit, Indian Statistical Institute

Dr. Begum Sertyesilisik
Assoc. Prof. at the Istanbul Technical University

Dr. Palani Elumalai
National Research Foundation Fellow of Korea, Department of Chemistry & Biology, University of Ulsan

Dr. Shittu Lukeman Adelaja Joseph
HOUSTON, TX. 77099, USA

Prof. Dr. Naqib Ullah Khan
Department of Plant Breeding and Genetics, The University of Agriculture, Peshawar 25130, Khyber Pakhtunkhwa, PAKISTAN.

Dr. V. Ananthaswamy
Assistant Professor, The Madura College (Autonomous), Madurai – 625 011, Tamil Nadu, India.

Prof. Dr. M.Nageeb Rashed
Professor of Analytical and Environmental Chemistry, Faculty of Science, Aswan University, Egypt

Dr. Hossein Kazemian
Faculty& Director; Northern Analytical Lab Services (NALS), University of Northern British Columbia (UNBC), 3333 University Way, Prince George, BC, Canada, V2N 4Z9

Dr. Vishnu Narayan Mishra
Applied Mathematics and Humanities Department, Sardar Vallabhbhai National Institute of Technology.

Dr. Balaram Kundu
Associate Professor, Department of Mechanical Engineering, Jadavpur University, Kolkata – 700 032, INDIA

Dr. Sergio Nardini
Associate Professor, Dipartimento di Ingegneria Industriale e dell’Informazione, Seconda Università degli Studi di Napoli, via Roma 29, 81031 Aversa (CE)

Dr. Sanjay Mishra
Professor, Department of Biotechnology, School of Engineering & Technology, IFTM University

Dr. Lakshmi Narayan Mishra
Professor, Department of Mathematics, National Institute of Technology

Dr. DHANANJAYA REDDY
Dept.of Mathematics, Assistant Professor In Mathematics, Govt. Degree & PG College

Dr. S. Krishna Murthy
Associate Professor, Department of Applied Mathematics,Defence Institute of Advanced Technology, Deemed University(DU), Girinagar, Pune

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1. Shuo Zhang. Experimental study on scouring of coarse sand and fine sand seabed caused by propeller washing in front of solid wharf.American Journal of Scientific Research and Essays, 2018 3:14. DOI:10.28933/ajsre-2018-12-1805 
2.Zhang Bo and Xie Xionggang. Numerical simulation and analysis of coupled Thermal-Hydrological-Mechanical in coalbed methane heating mining. American Journal of Scientific Research and Essays, 2018 3:13. DOI:10.28933/ajsre-2018-12-0808 

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